Nanoflower Architecture NiGa₂O₄ with a Spinel Structure Modified by 2D Layered RGO for Enhanced Li-Ion Battery Anode Performance

Abstract

Lithium-ion batteries are widely used in various fields of social life because of their good cycle performance and high energy density. The excellent performance of the anode electrode material directly determines the performance of the prepared battery. In recent years, bimetallic oxides with the spinel structure have been widely studied. However, the volume change in its structure during charge and discharge leads to its electrochemical instability, which cannot meet the needs of lithium batteries. Inspired by this, the NiGa 2 O 4 /RGO composite electrode material with a special structure was successfully designed and prepared by a simple hydrothermal method and subsequent heat treatment. The electrochemical properties of composites and pure materials are analyzed and compared. From the test results, it can be seen that NiGa 2 O 4 /RGO has outstanding electrochemical properties and fast kinetic behavior. After 200 charge/discharge cycles, the discharge specific capacity of the composite NiGa 2 O 4 /RGO is stably maintained at 610.5 mA h g −1 and the Coulomb efficiency can reach about 99%. Moreover, in this article, we analyzed the capacitance characteristics of NiGa 2 O 4 /RGO rarely reported in other articles, which enriched the research on the electrochemical properties of such substances. Finally, it contributes to promoting the feasibility of such bimetallic oxides in practical applications.

Ultrafine Sb2O3 Nanoparticle-Decorated Reduced Graphene Oxide as an Anode Material for Lithium-Ion Batteries

“…For example, Kong's group reported a synthesis of NiGa 2 O 4 /rGO nanoflower as an anode for LIBs, which showed outstanding electrochemical performance (610.5 mAh g −1 at 0.1 A g −1 ) and enhanced kinetics; however, the cost of the reagent (Ga(NO 3 ) 3 ) was expensive and the synthesis procedure was also complex. 41 A graphene-coated sea urchin-like Fe 3 O 4 @C composite was proposed by Chen et al as a high-energy anode for LIBs, which also required multiple hydrothermal treatments and subsequent calcination. 42 Though enhanced lithium storage properties were obtained in these studies, the high preparation cost and complex process make it unoptimistic for large-scale applications.…”

“…(iii) Hybridizing with a conductive carbon matrix/conductive carbon matrix [such as carbon nanotubes, carbon fiber, and reduced graphene oxide (rGO)], which can not only serve as a robust shell for volume variation but also facilitate ion/charge transfer within the electrode. − However, materials with the as-mentioned merits usually require complex preparation processes or high costs. For example, Kong’s group reported a synthesis of NiGa 2 O 4 /rGO nanoflower as an anode for LIBs, which showed outstanding electrochemical performance (610.5 mAh g –1 at 0.1 A g –1 ) and enhanced kinetics; however, the cost of the reagent (Ga­(NO 3 ) 3 ) was expensive and the synthesis procedure was also complex . A graphene-coated sea urchin-like Fe 3 O 4 @C composite was proposed by Chen et al as a high-energy anode for LIBs, which also required multiple hydrothermal treatments and subsequent calcination .…”

Supersonically Sprayed Carbon-Coated Bimetallic Zn2SnO4 with Reduced Graphene Oxide for Rapid-Charging, Binder-Free, and Long-Term-Stable Lithium-Ion-Battery Anodes

“…In the subsequent cycles, the distinctive grain boundaries of the two newly formed metal oxides alleviate the agglomeration of the identical metal oxides [22][23][24]. Third, the electrical network of bimetallic oxides is superior to that of a single-metal oxide, thereby providing superior electrochemical activity [25]. Consequently, the energy storage capability can be increased by facilitating redox reactions with two different metal oxides [26,27].…”

Synthesis of NiGa2O4 ultra-thin nanosheets for improved xylene sensing properties and selectivity

“…15 It is a good photocatalyst due to its appropriate band gap, strong absorption coefficient and strong reducibility in conduction band potential. 16,17 It has also demonstrated good electrochemical performance and cycling durability in lithium-ion batteries and supercapacitors. 17,18 In recent years, NiGa 2 O 4 has also been reported to show a good response to benzene series due to the distinctive catalytic activities of Ni 2+ .…”

“…16,17 It has also demonstrated good electrochemical performance and cycling durability in lithium-ion batteries and supercapacitors. 17,18 In recent years, NiGa 2 O 4 has also been reported to show a good response to benzene series due to the distinctive catalytic activities of Ni 2+ . [19][20][21] However, NiGa 2 O 4 prepared by conventional methods still suffers from low surface area and slow carrier mobility, which leads to poor sensing performance to xylene and obvious cross sensitivity to toluene.…”